Carrier mechanism for lumber-joining machines.



B. A. LINDERMAN.

CARRIER MECHANISM FOR LUMBER JOINING MACHINES.

APPLICATION FILED MAY 10. 1909.

929,232. Patented July 27, 1909.

2 SHEETS-SHEET 1.

B. A. LINDERMAN. CARRIER MECHANISM FOR LUMBER JOINING MACHINES.

APPLIOATIYON FILED MAY 10. 1909.

929,232, Patented July 27, 1909.

2 SHEETS-SHEET 2.

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. ii zs if Z8 I 17 I E M 34 a lnr znfor Afffrne ys BERTA. LINDERMAN, OF MUSKEGON, MICHIGAN.

' CARRIER MECHANISM FOR LUMBER-JOINING- MACHINES.

Specification of Letters Patent.

Patented July 27, 1909.

' Application filed May 10, 1909. Serial No. 495,119.

To all whom it may concern:

Beit known that I, BERT A; LINDERMAN,

a citizen of the United States, residing in Muskegomin the county of Muskegon and State of Michigan, iave invented a new and useful Improvement in Carrier Mechanism for Lumber-Joining Machines, of which the following is a specification.

This invention relates to the construction of the carriers used for feeding the stock in lumber-joining machines employing two oppositely moving carriers, in combination with cutters for cutting interfitting dove tails on the proximate edges of two pieces of lumber, and then acting to bring them toget-her by an endwise movement in which dovetails are carried into engagement. A machine of this general character is shown in the patent granted in the United States to Albert T. Linderman, on the 7th of August, 1906, and numbered 827,379. The

present invention is an improvement upon the earners shown 1n said Lmd'erman patent,

and intended to remove some of the'difiiculties attending the use of the said patented construction.

The nature of my improvement and its mode of operation are set forth in the de-' scription given below, and will also be understood from the accompanying drawing, in which latter- Figure 1 is a partial'side elevation of the carrier mechanism of a lumber joining machine embodying my invention. Fig. 2 is a detail elevation of a part of the mechanism. Fig. 3 is a longitudinal, vertical section of the parts shown in Fig. 1, partly broken away, and Fig. 4 is a plan of the carrier supporting mechanism, the carrier itself. being omitted.

In said drawing, 5, 5 represent the sections or carriages which are coupled together: and form one of the endless carriers of the lum-' ber joining machine. They pass around and may be operated by four sided wheels, one of which is shown at 6 and is mounted upon a cross shaft 7. Each carriage contains a- U-shaped lever or device 9, pivoted at 10, and carrying at the end of their upper limbs thedogs 11 adaptedto act as pusher-s of the lumberwhich rides upon the carrier.' The normal position of the device 9 is illustrated in the case of the lowermost carriage in Fig. 3, and in it the dog 11 is shown as withdrawnjentirely within the carriage so that it cannotact on the lumber. It 1s released from this position however while riding on wheel 6 and is then allowed to move to the position shown in the case of the two uppermost carriages which are sectioned in Fig. 3, and in which its dog is returned into acting position, by devices located within the wheel 6, and provided upon each of its four sides. These devices consist of lifters 8 projecting from the sides of the wheel, and adapted to enter the carriages while they are riding on it., These lifters are T-shaped, and pivoted at 12 at the outer end of one of its limbs, and the. outer end of the other limb encircles a guide 18 projecting from the hub of the wheel and having a spring 14 coiled around it and bearing upwardly against the lifter as will be understood from Fig. 8. The lifters act on the dog carrying levers of the carriages while riding on the wheel and press them upward so as to carry the dog into acting position. And in so doing the trigger 15 which is pivoted to the side of the carriage 5 and normally lies carriage of said figure. In this changed position the top of the trigger sets under the upper limb of the lever 9 and supports it, whlle its lower end projects below the carriage and'into the plane of action of a tripping arm 17 secured to a hub 18 on the shaft 19. By the tripper '17 the trigger is swung back to its horizontal position within the lever 9 and the latter is returned to its nonaeting position and continues in this position until it again rides on the wheel 6. The tripper is located close to the wheel so it will act on the triggers soon' after the carriages move off the wheel. .Said hub has a second arm 20 adapted to act with a vertical set screw 21, in adj-ustin the tripping;arm. Thetripper and its hu are located between supporting roller's'22-having V-shaped 'pe ripheriesi supporting the carrier, and the shaft 19 is su ported in a frame-23 swinging on cross shai 24 and yieldingly supported adjacent to theshaft by a pin 25and coiled spring 26. The frame member 27 .in which shaft 24 and other'p'arts just described, are mounted, is bolted toand adjusted from a cross member 28 of the main frame by screws 29, and by this adjustment the carrier is tightened from time to time as needed.

' Aswill be understood, the stock isfrequently longer than the carriages, and consequently the dogs of some of the latter are not needed for feeding purposes, and it is desirable that such dogs should be kept in their retracted positions. For this purpose I place a' governor 30 on the shaft 24, and provide it with a number, preferably four, of projecting teeth 31 of different widths,

. and these teeth are adapted to engage with an arm 32 mounted on the shaft 19, and secured on the squared end of said shaftby a spring catch 33, and by such engagement, to rock the shaft 19 so as to carry the tripper arm 17 below the plane of the triggers and prevent it from operating them. As the teeth 31 are of different widths, some of them may fail to operate'the trip arm, de-

pending upon the position of the trip arm. The trip arm is adjusted on its shaft in order to prevent the operating of any desir ed number of tri gers. Thus 'with the aid of the diiferentia gears 36, 37 and 38 hereinafter mentioned it may beset so as to cause the tripper to operate every trigger, or only every third, or fourth or fifth, or sixth, or eighth, or tenth, or twelfth or twentieth one.

The shaft 24 is actuated by a long gear 34 Y on the shaft 7, and an intermediate gear 35 is used to carry power to the differential gears 36, 37 and 38 on-shaft 24. The inter- I mediate gear ismounted on an arm 39 permitting it to be swung and shifted so it ma mesh with either of saidgears as desire The gears vary in size, so that the speed of the shaft 24 may be changed, and thereby change the intervals at whlch the governor operates the arm 32.

I claim i a 1. The carrier for lumber joining machines, composed of carriages, provided with retractable dogs for feedlng the lumber, a 1 wheel over WhlCh the carriermoves and by which the dogs are raised to acting position, devices adjacent tothe wheel for causing the retraction of the do s, and governin devices selectively con'tro ing the action 0 the retracting devices.)

2. The carrier for lumber joining machines, composed of' a series of carriages linked together and each provided with a retractable dog for feeding 'the lumber, a Wheel over which the carrier moves and by which the dogs are raised, means adjacent to the wheel adapted to cause the retraption of all the dogs,'a'nd governing devices "controllingthe retracti'n meahs so that "the dogs which are needed for feeding the stock being joined are not retracted.

3. The carrier; for lumber joining machines, composed of a series 'of carriages linked together and each provided with. a retractabledog for feeding the lumber, and a trigger by which the dog may be retracted, a wheel over which the carrier rides and by which the dogs "are raised, a tripping device adjacent to the'wheel adapted to operate the trig 'ers, and governing devices controlling sai tri ping device and preventing the retraction o thedogs which are needed to feed the lumber being united.

4. The carrier for lumber joining ma- ,chines, com osed of a series of carriages linked toget er and each provided with a retractable dog for feeding the lumber, and.

governing devices consisting of triggers carried by the'carriages, a tripping device engaging the tri gers, ,and a governing wheel controlling t e action of the tripping device.

5. The carrier ,for lumber joining machines, composed of a series of carriages linked together and each provided with a retractable dog for feeding the lumber, a wheel over wh1ch the carrier moves and by which the dogs are raised, means adjacent to the wheel adapted to cause the retraction of all the dogs, and adjustable governing de-' .vices controlling the retracting means so that only the dogs needed are retained in action, j

-. v BERT A.- "LINDERMAN. 'Witnesses: o

. w.. P. Mamet, A. B. 0001:. 

